203121103223 has 4 divisors (see below), whose sum is σ = 203142388680. Its totient is φ = 203099817768.

The previous prime is 203121103187. The next prime is 203121103261. The reversal of 203121103223 is 322301121302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 203121103223 - 2¹² = 203121099127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203121103195 and 203121103204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203121103123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10628408 + ... + 10647501.

It is an arithmetic number, because the mean of its divisors is an integer number (50785597170).

Almost surely, 2^203121103223 is an apocalyptic number.

203121103223 is a deficient number, since it is larger than the sum of its proper divisors (21285457).

203121103223 is an equidigital number, since it uses as much as digits as its factorization.

203121103223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21285456.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 203121103223 its reverse (322301121302), we get a palindrome (525422224525).

The spelling of 203121103223 in words is "two hundred three billion, one hundred twenty-one million, one hundred three thousand, two hundred twenty-three".